Through the good workmanship, the fine structure and the absolute even at lighter stretch overlooking leaks, I do not use it as an undershirt, but as long sleeve - sometimes just pure, partly with a colored T-shirt over - class.
Only the size is somewhat unexpected: For "L", it is quite narrow cut, the sleeves are a bit long - even though I had not unusually short arms (which is for example as an undershirt under a shirt but also needs to be.). This can be seen as well as here on the product image.
Who does not bother that can access safely.